The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
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Page 90
... hour to allow the sulpho - salt ( p . 86 ) to become decomposed by the metallic iron . 25 to 30 minutes are required for fusing the charge . The sample , fuming strongly from the vapors of the common salt , is then taken out , allowed ...
... hour to allow the sulpho - salt ( p . 86 ) to become decomposed by the metallic iron . 25 to 30 minutes are required for fusing the charge . The sample , fuming strongly from the vapors of the common salt , is then taken out , allowed ...
Page 91
... hour in the wind - furnace . - Pribram : 0.5 gramme ( 7.71 grains ) of crude argol is placed in the bottom of the crucible , upon this iron wire , then 5 grammes ( 77.16 grains ) of galena , and 12 grammes ( 185.1 grains ) of black flux ...
... hour in the wind - furnace . - Pribram : 0.5 gramme ( 7.71 grains ) of crude argol is placed in the bottom of the crucible , upon this iron wire , then 5 grammes ( 77.16 grains ) of galena , and 12 grammes ( 185.1 grains ) of black flux ...
Page 93
... hours are required for perfect fusion , and until the iron is free from lead globules . B. Lead monosulphide with foreign metallic sulphides ( galena with zinc blende , iron pyrites , etc .; lead matt , etc. ) . 1. Roasting and reducing ...
... hours are required for perfect fusion , and until the iron is free from lead globules . B. Lead monosulphide with foreign metallic sulphides ( galena with zinc blende , iron pyrites , etc .; lead matt , etc. ) . 1. Roasting and reducing ...
Page 94
... hour . The yield is from 10 to 12 per cent . Pb less than from an assay with metallic iron . It will be larger if charcoal dust is added in roasting , but the button will be less pure . 2. Assay with sulphuric acid ( combined dry and ...
... hour . The yield is from 10 to 12 per cent . Pb less than from an assay with metallic iron . It will be larger if charcoal dust is added in roasting , but the button will be less pure . 2. Assay with sulphuric acid ( combined dry and ...
Page 95
... hour in a solution of sodium sulphide containing sulphur . It is then filtered and washed , and the residuum is treated in the same manner as in the sulphuric acid assay . II . Oxidized Substances . A. Lead oxides free from earths ...
... hour in a solution of sodium sulphide containing sulphur . It is then filtered and washed , and the residuum is treated in the same manner as in the sulphuric acid assay . II . Oxidized Substances . A. Lead oxides free from earths ...
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Common terms and phrases
2.5 grammes 20 grammes added alloy ammonia ammonium antimony aqua regia argol arsenic assay sample beaker-glass bismuth black copper black flux boiled borax burette cent charcoal charge chloride coal cobalt color common salt containing copper covering of common crucible crucible Fig cubic centimeters cubic inches cupelled decanted decomposed determined diluted Dingler dried evaporated to dryness ferric oxide ferrous filtered filtrate flask fluid foreign metals Fresenius furnace fused fusion glass gold gramme 15.43 grains gramme 7.71 grains grammes 154.32 grains grammes 77.16 grains granulated lead heated hydrate hydrochloric acid ignited iron lead button liquid litharge mercury metallic sulphides meters method millimeters mixed mixture muffle muffle-furnace nickel nitric acid percentage placed platinum porcelain potassium carbonate potassium cyanide poured powdered precipitated pyrites refractory residue scorifier slag smelting sodium carbonate sodium sulphide substances sulphate sulphuretted hydrogen sulphuric acid temperature titrated tube u. h. Ztg volumetric washed weighed zinc Ztschr
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